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Transcript
## Site of drug action: - A drug may act: - **Extracellularly**: e.g. osmotic diuretics, plasma expanders - **On the cell surface**: e.g. digitalis, penicillin, catecholamines - **Inside the cell**: e.g. anti-cancer drugs, steroid hormones The plasma membrane is a semipermeable membran...
## Site of drug action: - A drug may act: - **Extracellularly**: e.g. osmotic diuretics, plasma expanders - **On the cell surface**: e.g. digitalis, penicillin, catecholamines - **Inside the cell**: e.g. anti-cancer drugs, steroid hormones The plasma membrane is a semipermeable membrane allowing certain chemical substances to pass freely e.g. it allows water, glucose, etc. but it won't allow sucrose until it is converted into glucose and fructose.